Continuing on my thoughts about woodworking, I was looking at laser engraved wood and CNC machines. Here are a couple of DIY videos from YouTube.

There is a company here in Eugene which specializes in this.

Here is a DIY project page: http://davidegironi.blogspot.it/2014/07/38mm-x-38mm-laser-engraver-build-using.html
http://www.aliexpress.com/item/PCB-milling-machine-CNC-2020B-DIY-cnc-wood-carving-machine-mini-engraving-machine-3050114A/32428314987.html

It also seems that andrio or bananna pi are also used. https://en.wikipedia.org/wiki/Banana_Pi